polars.Expr.name.suffix#
- Expr.name.suffix(suffix: str) Expr [source]#
Add a suffix to the root column name of the expression.
- Parameters:
- suffix
Suffix to add to the root column name.
Examples
>>> df = pl.DataFrame( ... { ... "a": [1, 2, 3], ... "b": ["x", "y", "z"], ... } ... ) >>> df.with_columns(pl.all().reverse().name.suffix("_reverse")) shape: (3, 4) ┌─────┬─────┬───────────┬───────────┐ │ a ┆ b ┆ a_reverse ┆ b_reverse │ │ --- ┆ --- ┆ --- ┆ --- │ │ i64 ┆ str ┆ i64 ┆ str │ ╞═════╪═════╪═══════════╪═══════════╡ │ 1 ┆ x ┆ 3 ┆ z │ │ 2 ┆ y ┆ 2 ┆ y │ │ 3 ┆ z ┆ 1 ┆ x │ └─────┴─────┴───────────┴───────────┘